KB 891609 - Could not connect to Virtual Server. Access was denied.

Summary from KB Article:

When you open the Virtual Server Administration Website in Microsoft Virtual Server 2005, you receive the following error message:

Could not connect to Virtual Server. Access was denied.
You can specify an alternate virtual server below.

I blogged about this problem when I first started running Virtual Server under Windows Server 2003 SP1 Release Candidate, and there have been many instances on the Microsoft internal discussion lists about people having similar problems. There is now a new KB article on support.microsoft.com providing the latest information on how to resolve this problem.